Each featuring 4" and 5" screen-sizes and delivering the application experiences as the original GALAXY S, the two versions are powered by 1GHz processor and the Android 2.2 "Froyo" OS, with a possibility to upgrade to 2.3 Gingerbread. Samsung will release the the GALAXY S WiFi 4.0 first in Russia and gradually in other countries. The GALAXY S WiFi 5.0 will be first available in Switzerland.